/*
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0
 
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#ifndef _TS_LUA_COROUTINE_H
#define _TS_LUA_COROUTINE_H

#include <stdio.h>
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include <ts/ts.h>


struct async_item;
typedef int (*async_clean)(struct async_item *item);

/* main context*/
typedef struct {
    lua_State           *lua;           // basic lua vm, injected
    TSMutex             mutexp;         // mutex for lua vm
    int                 gref;           // reference for lua vm self, in reg table
} ts_lua_main_ctx;

/* coroutine */
typedef struct {
    ts_lua_main_ctx     *mctx;
    lua_State           *lua;           // derived lua_thread
    int                 ref;            // reference for lua_thread, in REG Table
} ts_lua_coroutine;

/* continuation info */
typedef struct {
    ts_lua_coroutine    routine;
    TSCont              contp;          // continuation for the routine
    TSMutex             mutex;          // mutex for continuation
    struct async_item   *async_chain;   // async_item list
} ts_lua_cont_info;


/* asynchronous item */
typedef struct async_item {
    struct async_item   *next;
    ts_lua_cont_info    *cinfo;

    TSCont              contp;          // continuation for the async operation
    void                *data;          // private data

    async_clean         cleanup;        // cleanup function
    int                 deleted:1;
} ts_lua_async_item;


ts_lua_async_item * ts_lua_async_create_item(TSCont cont, async_clean func, void *d, ts_lua_cont_info *ci);
void ts_lua_release_cont_info(ts_lua_cont_info *ci);

#endif
